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Finding the Fourth Proportional to 203.76, 281.25 and 130.05

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Solution

The fourth proportional to 203.76, 281.25 and 130.05 is: 179.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.76 : 281.25 = 130.05 : x
  2. Step 2: Convert to fraction form
    203.76/281.25 = 130.05/x
  3. Step 3: Cross multiply
    203.76x = 281.25 × 130.05
  4. Step 4: Simplify right side
    203.76x = 36,576.56
  5. Step 5: Solve for x
    x = 36,576.56/203.76
  6. Step 6: Final answer
    x = 179.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.